Heating primer



2 Sheets-Sheet 1 H. G. IRWIN HEATING PRIMER 1211601 June 15,1920

m 1 G a w m H. G. IRWIN HEATING PRIMER May 15, 1923.

i 2 Sheets-Sheet 2 Filed June 15, 1920 Patented May 15, 1923.

UNITED STATES HERBERT G. IRWIN, OF FLOYDADA, TEXAS.

HEATING PRIMER.

Application fiIedJune 15, 1920. Serial No. 389,217.

To all whom it may concern:

Be it known that I, HERBERT G. TRWIN, citizen of the United States,residing at Floydada, in the county of Floyd and State of Texas, haveinvented certain new and useful Improvements in Heating Primers, ofwhich the following is a specificatlon.

This invention relates to a heating pr mer for starting cold ,internalcombustion engines.

The invention provides a primer of th s character in which an electricfuel heater 1s attached in combination with the vacuum tank of the fuelfeed system and serves to heat an initial quantity of fuel for startmgpurposes, such fuel to be drawn into the ntake manifold of the engine bythe suction created when starting.

A further object of the invention is to provide a fuel heater which iselectrically energized from the starting battery of a motor vehicle andis provided with a valve for regulating the outlet of the heated fuelgoing to the engine and at the same time controlling the connection ofthe primer with the fuel feed system.

I am aware that previous heating primers have been devised and patented,but thepres- 'en't invention differs in principle from previously knowndevices in that the fuel in the primer is regulated by the quantlty offuel in the gravity feed compartment of the vacuum tank. Y

*In the drawingsf Figure 1 is aside elevation'of an internal. I o

combustion engine mounted in a motor vehicle and having the presentinvention applied thereto. Figure 2 is a verticallOIlgltlldlIlfllSBCtiOIl through the switch and valve controlling means.

Figure 3 is a transverse section on the line 33 of Figure 2..

Figure 4 is a longitudinal'vertical section r through the heatingchamber.

Figure 5 is a similar section through the heating element. v

Figure 6 is a" section on the'l'ine 66 of Figure 5.

In detail:

"The invention, as herein shown, is asso- I ciated with an'internalcombustion engine A of a motor vehicle, the cowl B of the body cated atF- and the carbureter at G.

I assembled; thereof, the cowl board C, dash D,-and the The main fuelfeed line 1 connects with the vacuum tank E as shown at 2 and saidvacuum tank is vented by a suitable connection 3 in the usual manner.Adjacent the outlet at of the vacuum tank is a T 5 connected with thesaid vacuum tank outlet and with the fuel supply line 6 to thecarbureterG. The

additional'branch 7 of the T 5 is connected with a short nipple 8 whichis connected in turn with an elbow 9 of the primer cylinder 10 The upperend of the primer cylinder 10 carries aca-p valve 11 which will belaterdescribed but one side of this cap valve is connected by a short lengthof tubing 12 with the-opening 13 in the said vacuum tank E, while theother end is connected by a pipe 14 to the intake manifold F asindicated at 15. This arrangement forms the usual commun'ication, undernormal conditions, between the intake manifold and the vacuum tank fordrawing the fuel through the main supply line 1, to the vacuum chamberof the vacuum tank.

However, the cap valve 11 is so constructed that communlcation may beestablished by .means of a valve element 16 of the turning plug varietywith the vacuum tank and the manifold or with the interior of the primercylinder 10 and the manifold] for withdrawingand feeding intothemanifold the contents of the primer cylinder. The turning plug 16 ispassaged as at 17 and is tapered to fit in the tapered bore of the valvecap 11 which is threaded onto the cylinder lO as indicated at 18, thevalve being held in place by the washer" 19 and screw 20. At one endthevalve being carries the operating arm 21 the valve, carries theoperating arm 21 held n place by a nut 22 and said arm is held in theproper position for establishing'com- BR1111051131011 only between thevacuum tank and inlet manifold by a coil spring 23 having a hook 24engaging a pin 25 carried by a lug 26 of a band 27 encircling the primercylinder 10. The lower end' of the primer cylinder lO is closed bythe'cap 28 connecting withthe elbow 9. b

A tubular member29 having a threaded end 30 screws into the passage inthe cap valve 11 and is adaptedto extend down into the primer chamber10, when the primer is This tubular member 29 carries a perforate end 30which issurroundedby the insulating strips 31 notched as shown in Figure1, and having the configuration, in transno i verse section, shown inFigure 6. These parts are secured by metallic fusion at the bottom andheld in place over the fused end of the tube by the rivet'32. Members 33hold the insulating strips at the top. Wrapped about the insulatingstrips, [as shown in Figs. 4 and 5 is a heating element 34, theconvolutions of which seat'in notches 35 of the insulating member. Oneend of the heating element is connected to a binding post 36 which isinsulated from the cap 10-by va suitable insulatingbushing 37 and.washers to the level of the fuel in the gravity chamber of the vacuumtank E. Also it will be apparent that if the heating coil or element 34is energized by the closing of a suitable switch the result will be thatthe gasoline or other fuel within the primer cylinder 10 will becomeheated and partially vaporous so that the opening of the valve byturning the valve element 16 so that communication is establishedbetween the intake manifold 15 and the primer cylinder will result in acertain amount of vaporous and heated fluid fuel flowingto the intakemanifold 1*. This will be'particularly true when :the engine is beingcranked for startingas the suction on the intake manifold will thenpullthe fuel out of the primer cylinder 10.

Mounted in the cowl board C-of the vehiole is a switch body 41consisting of an 'insulation plug 42 surrounded by a casing 43 having aflange 44 by means of which the switch body is fastened to the cowlboard 'G. The-insulation plug 42 is cylindricall-y bored as at 45 andreceives a contact bushing dividedv into halves .47 and 48 spaced fromeach other as shown so that'there is 'no electrical contact between thetwo. Each of these bushing halves 47 and 48 is connected with itsrespective binding post 49 and 50 which are suitably connected with thewires leading to the heating element of thetprimer and battery. Mountedfor reciprocation Pin the bore 45 of the insulating body 42'of theswitch is a plug 51 which carries the con- ,and the insulationbody 42and such plug is held in place by a cap screw 57 slottedv as shown at 58to accommodate a screw driver and also slotted to permit an operatingelement'59 to engage the plug for movement of the same. This operatingelement reciprocates in a passage formed parallel to the axis of :theswitch body and integral with the casing 43 as indicated at 60. Theoperating element is connected-by a link 61 with the arm 21 for movingthe valve plug 16 and said operating element "carries an abutment 52whichenga'g es with the insulation'plug 51 for moving the spring lingers53'to form a con tact with the two bushing halves 47 and 48. Theoperating element or member 59 1s notched as indicated at 63 to engagewith the pin 64 to hold the switch plug in the connected position whendesired.

In using the :primer, .the operator of the vehicle just as .he .is aboutto start the car pulls the *opera'tingmember 59 out 'by grasping thering 65 withthe result that the heating-coil in the primer cylinder isenergized -=ber, means for admitting fuel to the chamber at the endopposite the :said valve to flow over the heating element, and means:for energizing said heating element.

2. In a primer for internal combustion-engines, a chamber, a cap-closingthe chamber at one end, a discharge pipe depending from the cap into thechamber-and opening at its lower end into the chamber, a valve upon thecap controlling flow throughsaid pipe, and

' a heating element carried by the pipe.

3. In a primer for internal combustion engines, a chamber, va capclosing :the chamber at one end, a discharge pipe depending from the capinto thechamber, a valve :upon the cap controlling flow through saidpipe, a perforate member mounted upon the lower end of said pipe,insulating strips secured about said perforate member, and a heatingelement mounted ,upon said strips.

4. The combination with an internal combustion engine, a subsidiaryvacuum fuel tank, and a suction pipe connectin thetank with the engineintake manifol whereby fuel will be drawn into the tank, of a fuelheating device fed from the tank and con- .nected with said pipe wherebyheated fuel may be drawn into (said manifold through said pipe.

5. The combination with .an internalcom- "bustion engine, a subsidiaryvacuum .fuel

rtank,:and a'snction pipe connecting the tank with the engine intakemanifold whereby fuel will be drawn into the tank, of a fuel heatingdevice fed from the tank and connected with said pipe, and a valve fordiverting suction from the tank to said device whereby heated fuel willbe drawn into the manifold through said pipe.

6. The combination with an internal combustion engine, a subsidiaryvacuum fuel tank, and a suction pipe connecting the tank with the engineintake manifold whereby fuel will be drawn into the tank, of a fuelheating device fed from the tank and connected with said pipe, a valvefor diverting suction from the tank to said device whereby heated fuelwill be drawn into the manifold through said pipe, and resilient meansnormally holding the valve in position establishing communicationbetween the manifold and tank.

7. The combination with an internal combustion engine, a subsidiaryvacuum fuel tank, and a suction pipe connecting the tank with the engineintake manifold whereby fuel will be drawn into the tank, of a fuelheating device connected with the tank whereby fuel will stand in saiddevice at the level of the fuel in the tank, a connection between thedevice and said pipe, and a valve for diverting suctionfrom the tank tosaid device whereby heated fuel will be drawn into the manifold throughsaid pipe.

In testimony whereof I affix my signature HERBERT G. IRWIN. [1 8.]

